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MB86R02 'Jade-D' Hardware Manual V1.64
18.10.2
Figure Drawing
18.10.2.1
Drawing primitives
MB86R02 'Jade-D' has a drawing interface that is compatible with the Coral PA graphics controller
which does not perform geometry processing. The following types of figure drawing primitives are
compatible with the MB86290A.
• Point
• Line
• Triangle
• High-speed 2DLine
• High-speed 2DTriangle
• Polygon
18.10.2.2
Polygon drawing function
An irregular polygon (including concave shape) is drawn by hardware in the following manner:
1. Execute PolygonBegin command.
Initialize polygon drawing hardware.
2. Draw vertices.
Draw outline of polygon and plot all vertices to polygon draw flag buffer using high-speed
2DTriangle primitive.
3. Execute PolygonEnd command.
Copy shape in polygon draw flag buffer to drawing frame and fill shape with color or specified tiling
pattern.
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